The game exists in at least two different versions: the original Quill A release (identified by being in first person) and the later Quill C release (in third person, and with some graphics).
As well as being published by Delta 4 themselves, the trilogy was re-released much later by GI Games (and then Zenobi).
An unofficial conversion of the ZX Spectrum version is available for Atari 400/800; ported by devwebcl.
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[+] Users currently playing this game
Much smaller than Part 1, but at least it has some puzzles. Again, it looks more like an excuse for the author's getting used to the Quill's basic facilities.